#include "wx/intl.h"
#include "wx/log.h"
#include "wx/utils.h"
+ #include "wx/vector.h"
#include "wx/wxcrtvararg.h"
#endif
#if wxUSE_OLE && defined(__WIN32__) && !defined(__GNUWIN32_OLD__)
+#include "wx/scopedarray.h"
#include "wx/msw/private.h" // includes <windows.h>
#ifdef __WXWINCE__
#define GetTymedName(tymed) wxEmptyString
#endif // wxDEBUG_LEVEL/!wxDEBUG_LEVEL
+namespace
+{
+
wxDataFormat HtmlFormatFixup(wxDataFormat format)
{
// Since the HTML format is dynamically registered, the wxDF_HTML
return format;
}
+// helper function for wxCopyStgMedium()
+HGLOBAL wxGlobalClone(HGLOBAL hglobIn)
+{
+ HGLOBAL hglobOut = NULL;
+
+ LPVOID pvIn = GlobalLock(hglobIn);
+ if (pvIn)
+ {
+ SIZE_T cb = GlobalSize(hglobIn);
+ hglobOut = GlobalAlloc(GMEM_FIXED, cb);
+ if (hglobOut)
+ {
+ CopyMemory(hglobOut, pvIn, cb);
+ }
+ GlobalUnlock(hglobIn);
+ }
+
+ return hglobOut;
+}
+
+// Copies the given STGMEDIUM structure.
+//
+// This is an local implementation of the function with the same name in
+// urlmon.lib but to use that function would require linking with urlmon.lib
+// and we don't want to require it, so simple reimplement it here.
+HRESULT wxCopyStgMedium(const STGMEDIUM *pmediumIn, STGMEDIUM *pmediumOut)
+{
+ HRESULT hres = S_OK;
+ STGMEDIUM stgmOut = *pmediumIn;
+
+ if (pmediumIn->pUnkForRelease == NULL &&
+ !(pmediumIn->tymed & (TYMED_ISTREAM | TYMED_ISTORAGE)))
+ {
+ // Object needs to be cloned.
+ if (pmediumIn->tymed == TYMED_HGLOBAL)
+ {
+ stgmOut.hGlobal = wxGlobalClone(pmediumIn->hGlobal);
+ if (!stgmOut.hGlobal)
+ {
+ hres = E_OUTOFMEMORY;
+ }
+ }
+ else
+ {
+ hres = DV_E_TYMED; // Don't know how to clone GDI objects.
+ }
+ }
+
+ if ( SUCCEEDED(hres) )
+ {
+ switch ( stgmOut.tymed )
+ {
+ case TYMED_ISTREAM:
+ stgmOut.pstm->AddRef();
+ break;
+
+ case TYMED_ISTORAGE:
+ stgmOut.pstg->AddRef();
+ break;
+ }
+
+ if ( stgmOut.pUnkForRelease )
+ stgmOut.pUnkForRelease->AddRef();
+
+ *pmediumOut = stgmOut;
+ }
+
+ return hres;
+}
+
+} // anonymous namespace
+
// ----------------------------------------------------------------------------
// wxIEnumFORMATETC interface implementation
// ----------------------------------------------------------------------------
bool m_mustDelete;
wxDECLARE_NO_COPY_CLASS(wxIDataObject);
+
+ // The following code is need to be able to store system data the operating
+ // system is using for it own purposes, e.g. drag images.
+
+ class SystemDataEntry
+ {
+ public:
+ // Ctor takes ownership of the pointers.
+ SystemDataEntry(FORMATETC *pformatetc, STGMEDIUM *pmedium)
+ : pformatetc(pformatetc), pmedium(pmedium)
+ {
+ }
+
+ ~SystemDataEntry()
+ {
+ delete pformatetc;
+ delete pmedium;
+ }
+
+ FORMATETC *pformatetc;
+ STGMEDIUM *pmedium;
+ };
+ typedef wxVector<SystemDataEntry*> SystemData;
+
+ // get system data specified by the given format
+ bool GetSystemData(wxDataFormat format, STGMEDIUM*) const;
+
+ // determines if the data object contains system data specified by the given format.
+ bool HasSystemData(wxDataFormat format) const;
+
+ // save system data
+ HRESULT SaveSystemData(FORMATETC*, STGMEDIUM*, BOOL fRelease);
+
+ // container for system data
+ SystemData m_systemData;
};
+bool
+wxIDataObject::GetSystemData(wxDataFormat format, STGMEDIUM *pmedium) const
+{
+ for ( SystemData::const_iterator it = m_systemData.begin();
+ it != m_systemData.end();
+ ++it )
+ {
+ FORMATETC* formatEtc = (*it)->pformatetc;
+ if ( formatEtc->cfFormat == format )
+ {
+ wxCopyStgMedium((*it)->pmedium, pmedium);
+ return true;
+ }
+ }
+
+ return false;
+}
+
+bool
+wxIDataObject::HasSystemData(wxDataFormat format) const
+{
+ for ( SystemData::const_iterator it = m_systemData.begin();
+ it != m_systemData.end();
+ ++it )
+ {
+ FORMATETC* formatEtc = (*it)->pformatetc;
+ if ( formatEtc->cfFormat == format )
+ return true;
+ }
+
+ return false;
+}
+
+// save system data
+HRESULT
+wxIDataObject::SaveSystemData(FORMATETC *pformatetc,
+ STGMEDIUM *pmedium,
+ BOOL fRelease)
+{
+ if ( pformatetc == NULL || pmedium == NULL )
+ return E_INVALIDARG;
+
+ // remove entry if already available
+ for ( SystemData::iterator it = m_systemData.begin();
+ it != m_systemData.end();
+ ++it )
+ {
+ if ( pformatetc->tymed & (*it)->pformatetc->tymed &&
+ pformatetc->dwAspect == (*it)->pformatetc->dwAspect &&
+ pformatetc->cfFormat == (*it)->pformatetc->cfFormat )
+ {
+ delete (*it);
+ m_systemData.erase(it);
+ break;
+ }
+ }
+
+ // create new format/medium
+ FORMATETC* pnewformatEtc = new FORMATETC;
+ STGMEDIUM* pnewmedium = new STGMEDIUM;
+
+ wxZeroMemory(*pnewformatEtc);
+ wxZeroMemory(*pnewmedium);
+
+ // copy format
+ *pnewformatEtc = *pformatetc;
+
+ // copy or take ownerschip of medium
+ if ( fRelease )
+ *pnewmedium = *pmedium;
+ else
+ wxCopyStgMedium(pmedium, pnewmedium);
+
+ // save entry
+ m_systemData.push_back(new SystemDataEntry(pnewformatEtc, pnewmedium));
+
+ return S_OK;
+}
+
// ============================================================================
// implementation
// ============================================================================
wxIDataObject::~wxIDataObject()
{
+ // delete system data
+ for ( SystemData::iterator it = m_systemData.begin();
+ it != m_systemData.end();
+ ++it )
+ {
+ delete (*it);
+ }
+
if ( m_mustDelete )
{
delete m_pDataObject;
wxDataFormat format = (wxDataFormat::NativeFormat)pformatetcIn->cfFormat;
format = HtmlFormatFixup(format);
+ // is this system data?
+ if ( GetSystemData(format, pmedium) )
+ {
+ // pmedium is already filled with corresponding data, so we're ready.
+ return S_OK;
+ }
+
switch ( format )
{
case wxDF_BITMAP:
m_pDataObject->SetData(wxDF_ENHMETAFILE, 0, &pmedium->hEnhMetaFile);
break;
+ case TYMED_ISTREAM:
+ // check if this format is supported
+ if ( !m_pDataObject->IsSupported(pformatetc->cfFormat,
+ wxDataObject::Set) )
+ {
+ // As this is not a supported format (content data), assume it
+ // is system data and save it.
+ return SaveSystemData(pformatetc, pmedium, fRelease);
+ }
+ break;
+
case TYMED_MFPICT:
// fall through - we pass METAFILEPICT through HGLOBAL
case TYMED_HGLOBAL:
format = HtmlFormatFixup(format);
- // this is quite weird, but for file drag and drop, explorer
- // calls our SetData() with the formats we do *not* support!
- //
- // as we can't fix this bug in explorer (it's a bug because it
- // should only use formats returned by EnumFormatEtc), do the
- // check here
+ // check if this format is supported
if ( !m_pDataObject->IsSupported(format, wxDataObject::Set) ) {
- // go away!
- return DV_E_FORMATETC;
+ // As above, assume that unsupported format must be system
+ // data and just save it.
+ return SaveSystemData(pformatetc, pmedium, fRelease);
}
// copy data
wxLogTrace(wxTRACE_OleCalls, wxT("wxIDataObject::QueryGetData: %s ok"),
wxGetFormatName(format));
}
+ else if ( HasSystemData(format) )
+ {
+ wxLogTrace(wxTRACE_OleCalls, wxT("wxIDataObject::QueryGetData: %s ok (system data)"),
+ wxGetFormatName(format));
+ // this is system data, so no further checks needed.
+ return S_OK;
+ }
else {
wxLogTrace(wxTRACE_OleCalls,
wxT("wxIDataObject::QueryGetData: %s unsupported"),
wxDataObject::Direction dir = dwDir == DATADIR_GET ? wxDataObject::Get
: wxDataObject::Set;
- ULONG nFormatCount = wx_truncate_cast(ULONG, m_pDataObject->GetFormatCount(dir));
- wxDataFormat format;
- wxDataFormat *formats;
- formats = nFormatCount == 1 ? &format : new wxDataFormat[nFormatCount];
- m_pDataObject->GetAllFormats(formats, dir);
+ // format count is total of user specified and system formats.
+ const size_t ourFormatCount = m_pDataObject->GetFormatCount(dir);
+ const size_t sysFormatCount = m_systemData.size();
- wxIEnumFORMATETC *pEnum = new wxIEnumFORMATETC(formats, nFormatCount);
- pEnum->AddRef();
- *ppenumFormatEtc = pEnum;
+ const ULONG
+ nFormatCount = wx_truncate_cast(ULONG, ourFormatCount + sysFormatCount);
- if ( formats != &format ) {
- delete [] formats;
+ // fill format array with formats ...
+ wxScopedArray<wxDataFormat> formats(new wxDataFormat[nFormatCount]);
+
+ // ... from content data (supported formats)
+ m_pDataObject->GetAllFormats(formats.get(), dir);
+
+ // ... from system data
+ for ( size_t j = 0; j < sysFormatCount; j++ )
+ {
+ SystemDataEntry* entry = m_systemData[j];
+ wxDataFormat& format = formats[ourFormatCount + j];
+ format = entry->pformatetc->cfFormat;
}
+ wxIEnumFORMATETC *pEnum = new wxIEnumFORMATETC(formats.get(), nFormatCount);
+ pEnum->AddRef();
+ *ppenumFormatEtc = pEnum;
+
return S_OK;
}
virtual ~wxIDropTarget();
// accessors for wxDropTarget
+ HWND GetHWND() const { return m_hwnd; }
void SetHwnd(HWND hwnd) { m_hwnd = hwnd; }
// IDropTarget methods
}
#endif // 0
- if ( !m_pTarget->MSWIsAcceptedData(pIDataSource) ) {
- // we don't accept this kind of data
- *pdwEffect = DROPEFFECT_NONE;
-
- return S_OK;
- }
-
// for use in OnEnter and OnDrag calls
m_pTarget->MSWSetDataSource(pIDataSource);
m_pIDataObject = pIDataSource;
m_pIDataObject->AddRef();
- // we need client coordinates to pass to wxWin functions
- if ( !ScreenToClient(m_hwnd, (POINT *)&pt) )
+ if ( !m_pTarget->MSWIsAcceptedData(pIDataSource) ) {
+ // we don't accept this kind of data
+ *pdwEffect = DROPEFFECT_NONE;
+ }
+ else
{
- wxLogLastError(wxT("ScreenToClient"));
+ // we need client coordinates to pass to wxWin functions
+ if ( !ScreenToClient(m_hwnd, (POINT *)&pt) )
+ {
+ wxLogLastError(wxT("ScreenToClient"));
+ }
+
+ // give some visual feedback
+ *pdwEffect = ConvertDragResultToEffect(
+ m_pTarget->OnEnter(pt.x, pt.y, ConvertDragEffectToResult(
+ GetDropEffect(grfKeyState, m_pTarget->GetDefaultAction(), *pdwEffect))
+ )
+ );
}
- // give some visual feedback
- *pdwEffect = ConvertDragResultToEffect(
- m_pTarget->OnEnter(pt.x, pt.y, ConvertDragEffectToResult(
- GetDropEffect(grfKeyState, m_pTarget->GetDefaultAction(), *pdwEffect))
- )
- );
+ // update drag image
+ const wxDragResult res = ConvertDragEffectToResult(*pdwEffect);
+ m_pTarget->MSWUpdateDragImageOnEnter(pt.x, pt.y, res);
+ m_pTarget->MSWUpdateDragImageOnDragOver(pt.x, pt.y, res);
return S_OK;
}
+
+
// Name : wxIDropTarget::DragOver
// Purpose : Indicates that the mouse was moved inside the window represented
// by this drop target.
*pdwEffect = DROPEFFECT_NONE;
}
+ // update drag image
+ m_pTarget->MSWUpdateDragImageOnDragOver(pt.x, pt.y,
+ ConvertDragEffectToResult(*pdwEffect));
+
return S_OK;
}
// release the held object
RELEASE_AND_NULL(m_pIDataObject);
+ // update drag image
+ m_pTarget->MSWUpdateDragImageOnLeave();
+
return S_OK;
}
// release the held object
RELEASE_AND_NULL(m_pIDataObject);
+ // update drag image
+ m_pTarget->MSWUpdateDragImageOnData(pt.x, pt.y,
+ ConvertDragEffectToResult(*pdwEffect));
+
return S_OK;
}
// ----------------------------------------------------------------------------
wxDropTarget::wxDropTarget(wxDataObject *dataObj)
- : wxDropTargetBase(dataObj)
+ : wxDropTargetBase(dataObj),
+ m_dropTargetHelper(NULL)
{
// create an IDropTarget implementation which will notify us about d&d
// operations.
// we will need the window handle for coords transformation later
m_pIDropTarget->SetHwnd((HWND)hwnd);
+ MSWInitDragImageSupport();
+
return true;
#endif
}
::CoLockObjectExternal(m_pIDropTarget, FALSE, TRUE);
#endif
+ MSWEndDragImageSupport();
+
+ // remove window reference
m_pIDropTarget->SetHwnd(0);
#endif
}
{
wxDataFormat format = MSWGetSupportedFormat(m_pIDataSource);
if ( format == wxDF_INVALID ) {
- // this is strange because IsAcceptedData() succeeded previously!
- wxFAIL_MSG(wxT("strange - did supported formats list change?"));
-
return false;
}
return n < nFormats ? format : wxFormatInvalid;
}
+// ----------------------------------------------------------------------------
+// drag image functions
+// ----------------------------------------------------------------------------
+
+void
+wxDropTarget::MSWEndDragImageSupport()
+{
+ // release drop target helper
+ if ( m_dropTargetHelper != NULL )
+ {
+ m_dropTargetHelper->Release();
+ m_dropTargetHelper = NULL;
+ }
+}
+
+void
+wxDropTarget::MSWInitDragImageSupport()
+{
+ // Use the default drop target helper to show shell drag images
+ CoCreateInstance(CLSID_DragDropHelper, NULL, CLSCTX_INPROC_SERVER,
+ IID_IDropTargetHelper, (LPVOID*)&m_dropTargetHelper);
+}
+
+void
+wxDropTarget::MSWUpdateDragImageOnData(wxCoord x,
+ wxCoord y,
+ wxDragResult dragResult)
+{
+ // call corresponding event on drop target helper
+ if ( m_dropTargetHelper != NULL )
+ {
+ POINT pt = {x, y};
+ DWORD dwEffect = ConvertDragResultToEffect(dragResult);
+ m_dropTargetHelper->Drop(m_pIDataSource, &pt, dwEffect);
+ }
+}
+
+void
+wxDropTarget::MSWUpdateDragImageOnDragOver(wxCoord x,
+ wxCoord y,
+ wxDragResult dragResult)
+{
+ // call corresponding event on drop target helper
+ if ( m_dropTargetHelper != NULL )
+ {
+ POINT pt = {x, y};
+ DWORD dwEffect = ConvertDragResultToEffect(dragResult);
+ m_dropTargetHelper->DragOver(&pt, dwEffect);
+ }
+}
+
+void
+wxDropTarget::MSWUpdateDragImageOnEnter(wxCoord x,
+ wxCoord y,
+ wxDragResult dragResult)
+{
+ // call corresponding event on drop target helper
+ if ( m_dropTargetHelper != NULL )
+ {
+ POINT pt = {x, y};
+ DWORD dwEffect = ConvertDragResultToEffect(dragResult);
+ m_dropTargetHelper->DragEnter(m_pIDropTarget->GetHWND(), m_pIDataSource, &pt, dwEffect);
+ }
+}
+
+void
+wxDropTarget::MSWUpdateDragImageOnLeave()
+{
+ // call corresponding event on drop target helper
+ if ( m_dropTargetHelper != NULL )
+ {
+ m_dropTargetHelper->DragLeave();
+ }
+}
+
// ----------------------------------------------------------------------------
// private functions
// ----------------------------------------------------------------------------
projects / wxWidgets.git / commitdiff
